<template>
  <div class="upload-container">

    <el-button
      :style="{background:color,borderColor:color}"
      icon="el-icon-upload"
      size="mini"
      type="primary"
      @click=" dialogVisible=true"
      :disabled="disabled"
    >上传图片</el-button>
    <el-dialog :visible.sync="dialogVisible" :modal="false">
      <el-upload
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        :on-remove="handleRemove"
        :on-success="handleSuccess"
        :before-upload="beforeUpload"
        class="editor-slide-upload"
        :action="`${VUE_APP_API}/jcdSys/jcdDataUpload/fileUpload`"
        list-type="picture-card"
        :data="dataObj"
        accept=".jpg, .jpeg, .png, .gif, .bmp, .JPG, .JPEG, .PNG, .GIF, .BMP"
      >
        <el-button size="small" type="primary">点击上传</el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">取消</el-button>
      <el-button type="primary" @click="handleSubmit">确定</el-button>
    </el-dialog>
  </div>
</template>

<script>
import * as api from '@/api/components'
const VUE_APP_API = process.env.VUE_APP_API
const VUE_APP_FILE = process.env.VUE_APP_FILE

export default {
  name: 'EditorSlideUpload',
  props: {
    color: {
      type: String,
      default: '#1890ff'
    },
    maxSize: {
      type: Number,
      default: 10
    },
    disabled: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      dialogVisible: false,
      listObj: {},
      fileList: [],
      //上传的额外附加参数
      dataObj: {
        // 'login-token': loginToken
      },
      VUE_APP_API
    }
  },
  methods: {
    checkAllSuccess() {
      return Object.keys(this.listObj).every(
        item => this.listObj[item].hasSuccess
      )
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v])
      if (!this.checkAllSuccess()) {
        this.$message(
          '请等待所有图片上传成功。如果有网络问题，请刷新页面并重新上传!'
        )
        return
      }
      this.$emit('successCBK', arr)
      this.listObj = {}
      this.fileList = []
      this.dialogVisible = false
    },
    handleSuccess(response, file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = VUE_APP_FILE + '/' + response.data
          this.listObj[objKeyArr[i]].hasSuccess = true
          return
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]]
          return
        }
      }
    },
    beforeUpload(file) {
      if (this.maxSize) {
        const fileLength = (file.size / 1024 / 1024).toFixed(2)
        if (fileLength > this.maxSize) {
          this.$message({
            message:
              '上传图片大小超过' +
              this.maxSize +
              'M，此图片大小为' +
              fileLength +
              'M，请重新选择图片',
            type: 'error',
            duration: 3000
          })
          return false
        }
      }
      const _self = this
      const _URL = window.URL || window.webkitURL
      const fileName = file.uid
      this.listObj[fileName] = {}
      return new Promise((resolve, reject) => {
        const img = new Image()
        img.src = _URL.createObjectURL(file)
        img.onload = function() {
          _self.listObj[fileName] = {
            hasSuccess: false,
            uid: file.uid,
            width: this.width,
            height: this.height
          }
        }
        resolve(true)
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  >>> .el-upload--picture-card {
    width: 148px;
  }
}


</style>
